1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Simple Integral

  1. Oct 3, 2009 #1
    Hey, not really homework but I am just having a total mind blank and would be grateful if someone could help me.
    I even have the answer my brain is just refusing to play along though and I just can't picture how to work it out properly at the moment.
  2. jcsd
  3. Oct 3, 2009 #2


    User Avatar
    Homework Helper

    try writing it as

    [tex]\int \frac{dx}{dt} \frac{dx}{dt} dt[/tex]

  4. Oct 3, 2009 #3
    Thanks for your reply.
    In that case I don't have brain freeze I just don't know. I just want to cancel the dt's but then
    I get
    [tex]\int \frac{dx}{dt}dx[/tex]
    which I don't know how to handle.
  5. Oct 3, 2009 #4


    User Avatar
    Science Advisor
    Homework Helper

    It's not the sort of an expression where you can eliminate the t dependence. The answer depends on how x depends on t. E.g. if x(t)=t^2, then it's an easy elementary integral, if x(t)=e^(t^2), it's not an elementary integral.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook